کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9674130 | 1453198 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Particle size distribution of polycyclic aromatic hydrocarbons in motorcycle exhaust emissions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
The size distribution of polycyclic aromatic hydrocarbons (PAHs) in emission of a two-stroke carburetor motorcycle was studied. The exhaust gas from the test motorcycle was passed to a dilution tunnel and collected using a 10 cascade micro-orifice uniform deposit impactor (MOUDI) of 0.056-10 μm aerodynamic diameter fitted with aluminum substrates. All MOUDI substrates were analyzed for particulate mass and for PAHs by GC/MS. Most of the 21 analyzed PAHs have two significant modes that peak at <0.1 and 0.18-0.32 μm. For some PAHs, a third peak appears around 1.8 μm. MOUDI impactor samples show that 88.9% particulate and 89.6% PAH mass distributed smaller than 2.5 μm. Mass median diameters of PAHs are about 0.2 μm. Total benzo[a]pyrene toxic equivalency emission factor was 440 ± 13.8 ng/km for the test motorcycle. An average of 90.3% of carcinogenicity is observed in particulate smaller than 1.0 μm. The results suggest that submicron particulates predominate in the exhaust from motorcycle and exhibit high carcinogenic potency for these particulate.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 125, Issues 1â3, 17 October 2005, Pages 154-159
Journal: Journal of Hazardous Materials - Volume 125, Issues 1â3, 17 October 2005, Pages 154-159
نویسندگان
Hsi-Hsien Yang, Shu-Mei Chien, Mu-Rong Chao, Chi-Chwen Lin,